I had a lap appendectomy 1week ago. Abdominal pain worsened 3 days ago. I have a lot of nausea dizziness. I have been lifting my 25lb baby. Ab swellin?

Be checked. . You may have just done too much but to be safe you should see your surgeon and get checked. There is always the possibility of a leak from the appendix stump, abscess formation, post-op ileus, or other complications, so be safe and get checked.
Be seen. You might have pulled out your stitches, or have twisted your bowels. Severe pain, nausea, and dizziness should prompt another evaluation.